<script setup lang="ts">
// 热门推荐页 标题和url
import {hotPreferenceApi} from "@/services/hot";
import {onLoad} from "@dcloudio/uni-app";
import {ref} from "vue";
import type {HotSubTypes} from "@/types/hot";

const hotMap = [
  {type: '1', title: '特惠推荐', url: '/hot/preference'},
  {type: '2', title: '爆款推荐', url: '/hot/inVogue'},
  {type: '3', title: '一站买全', url: '/hot/oneStop'},
  {type: '4', title: '新鲜好物', url: '/hot/new'},
]
// uniapp获取页面参数
const queryProps = defineProps<{
  type: string
}>()
const currUrlMap = hotMap.find(v => v.type === queryProps.type)
// 动态设置标题
uni.setNavigationBarTitle({title: currUrlMap!.title})
// 推荐封面图
const bannerPicture = ref('')
// 推荐选项
const subTypes = ref<(HotSubTypes & { finish?: boolean })[]>([])
const activeIndex = ref(0)
// 获取热门推荐
const getHotPreferenceData = async () => {
  const res = await hotPreferenceApi(currUrlMap!.url,{
    // 技巧：环境变量，开发环境，修改初始页面方便测试 分页结束
    page:import.meta.env.DEV?32:1,
    pageSize:10
  })
  bannerPicture.value = res.result.bannerPicture
  subTypes.value = res.result.subTypes
}
// 滚动触底
const onScrolltolower = async () => {
  //  当前tab对应列表
  const currSubTypes = subTypes.value[activeIndex.value]
  if (currSubTypes.goodsItems.page < currSubTypes.goodsItems.pages) {
    // 页码累加
    currSubTypes.goodsItems.page++
  } else {
    currSubTypes.finish = true
    return uni.showToast({title: '没有更多数据额', icon: 'none'})
  }

  const res = await hotPreferenceApi(currUrlMap!.url,
      {
        subType: currSubTypes.id,
        page: currSubTypes.goodsItems.page,
        pageSize: currSubTypes.goodsItems.pageSize
      })
  // 新的列表 比如page为2时接口
  const newSubTypes = res.result.subTypes[activeIndex.value]
  currSubTypes.goodsItems.items.push(...newSubTypes.goodsItems.items)
}
onLoad(() => {
  getHotPreferenceData()
})
</script>

<template>
  <!-- 首页推荐公共组件 -->
  <view class="viewport">
    <!-- 推荐封面图 -->
    <view class="cover">
      <image
          :src="bannerPicture"
      ></image>
    </view>
    <!-- 推荐选项 -->
    <view class="tabs">
      <text class="text"
            v-for="(item,index) in subTypes" :key="item.id"
            :class="{active:activeIndex===index}"
            @tap="activeIndex=index">{{ item.title }}
      </text>
    </view>
    <!-- 推荐列表 -->
    <scroll-view scroll-y class="scroll-view"
                 v-for="(item,index) in subTypes"
                 :key="item.id"
                 v-show="index===activeIndex"
                 @scrolltolower="onScrolltolower"
    >
      <view class="goods">
        <navigator
            hover-class="none"
            class="navigator"
            v-for="goods in item.goodsItems.items"
            :key="goods.id"
            :url="`/pages/goods/goods?id=${goods.id}`"
        >
          <image
              class="thumb"
              :src="goods.picture"
          ></image>
          <view class="name ellipsis">{{ goods.name }}</view>
          <view class="price">
            <text class="symbol">¥</text>
            <text class="number">{{ goods.price }}</text>
          </view>
        </navigator>
      </view>
      <view class="loading-text">{{ item.finish ? '没有更多数据额...' : '正在加载...'}}</view>
    </scroll-view>
  </view>
</template>

<style lang="scss">
page {
  height: 100%;
  background-color: #f4f4f4;
}

.viewport {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 180rpx 0 0;
  position: relative;
}

.cover {
  width: 750rpx;
  height: 225rpx;
  border-radius: 0 0 40rpx 40rpx;
  overflow: hidden;
  position: absolute;
  left: 0;
  top: 0;

  .image {
    width: 750rpx;
  }
}

.scroll-view {
  flex: 1;
}

.tabs {
  display: flex;
  justify-content: space-evenly;
  height: 100rpx;
  line-height: 90rpx;
  margin: 0 20rpx;
  font-size: 28rpx;
  border-radius: 10rpx;
  box-shadow: 0 4rpx 5rpx rgba(200, 200, 200, 0.3);
  color: #333;
  background-color: #fff;
  position: relative;
  z-index: 9;

  .text {
    margin: 0 20rpx;
    position: relative;
  }

  .active {
    &::after {
      content: '';
      width: 40rpx;
      height: 4rpx;
      transform: translate(-50%);
      background-color: #27ba9b;
      position: absolute;
      left: 50%;
      bottom: 24rpx;
    }
  }
}

.goods {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  padding: 0 20rpx 20rpx;

  .navigator {
    width: 345rpx;
    padding: 20rpx;
    margin-top: 20rpx;
    border-radius: 10rpx;
    background-color: #fff;
  }

  .thumb {
    width: 305rpx;
    height: 305rpx;
  }

  .name {
    height: 88rpx;
    font-size: 26rpx;
  }

  .price {
    line-height: 1;
    color: #cf4444;
    font-size: 30rpx;
  }

  .symbol {
    font-size: 70%;
  }

  .decimal {
    font-size: 70%;
  }
}

.loading-text {
  text-align: center;
  font-size: 28rpx;
  color: #666;
  padding: 20rpx 0 50rpx;
}
</style>

